Pidgin is an instant messaging program which can log in to multipleaccounts on multiple instant messaging networks simultaneously. Info/Query(IQ) is an Extensible Messaging and Presence Protocol (XMPP) specificrequest-response mechanism.

A NULL pointer dereference flaw was found in the way the Pidgin XMPPprotocol plug-in processes IQ error responses when trying to fetch a customsmiley. A remote client could send a specially-crafted IQ error responsethat would crash Pidgin. (CVE-2009-3085)

A NULL pointer dereference flaw was found in the way the Pidgin IRCprotocol plug-in handles IRC topics. A malicious IRC server could send aspecially-crafted IRC TOPIC message, which once received by Pidgin, wouldlead to a denial of service (Pidgin crash). (CVE-2009-2703)

It was discovered that, when connecting to certain, very old Jabber serversvia XMPP, Pidgin may ignore the "Require SSL/TLS" setting. In thesesituations, a non-encrypted connection is established rather than theconnection failing, causing the user to believe they are using an encryptedconnection when they are not, leading to sensitive information disclosure(session sniffing). (CVE-2009-3026)

A NULL pointer dereference flaw was found in the way the Pidgin MSNprotocol plug-in handles improper MSNSLP invitations. A remote attackercould send a specially-crafted MSNSLP invitation request, which onceaccepted by a valid Pidgin user, would lead to a denial of service (Pidgincrash). (CVE-2009-3083)

These packages upgrade Pidgin to version 2.6.2. Refer to the Pidgin releasenotes for a full list of changes: http://developer.pidgin.im/wiki/ChangeLog

All Pidgin users should upgrade to these updated packages, which correctthese issues. Pidgin must be restarted for this update to take effect.

4. Solution:

Before applying this update, make sure that all previously-releasederrata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to usethe Red Hat Network to apply this update are available athttp://kbase.redhat.com/faq/docs/DOC-11259